Because libraries on Windows lack useful version information, the zlib
[openssl.git] / crypto / comp / comp_lib.c
1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <string.h>
4 #include <openssl/objects.h>
5 #include <openssl/comp.h>
6
7 COMP_CTX *COMP_CTX_new(COMP_METHOD *meth)
8         {
9         COMP_CTX *ret;
10
11         if ((ret=(COMP_CTX *)OPENSSL_malloc(sizeof(COMP_CTX))) == NULL)
12                 {
13                 /* ZZZZZZZZZZZZZZZZ */
14                 return(NULL);
15                 }
16         memset(ret,0,sizeof(COMP_CTX));
17         ret->meth=meth;
18         if ((ret->meth->init != NULL) && !ret->meth->init(ret))
19                 {
20                 OPENSSL_free(ret);
21                 ret=NULL;
22                 }
23         return(ret);
24         }
25
26 void COMP_CTX_free(COMP_CTX *ctx)
27         {
28         if(ctx == NULL)
29             return;
30
31         if (ctx->meth->finish != NULL)
32                 ctx->meth->finish(ctx);
33
34         OPENSSL_free(ctx);
35         }
36
37 int COMP_compress_block(COMP_CTX *ctx, unsigned char *out, int olen,
38              unsigned char *in, int ilen)
39         {
40         int ret;
41         if (ctx->meth->compress == NULL)
42                 {
43                 /* ZZZZZZZZZZZZZZZZZ */
44                 return(-1);
45                 }
46         ret=ctx->meth->compress(ctx,out,olen,in,ilen);
47         if (ret > 0)
48                 {
49                 ctx->compress_in+=ilen;
50                 ctx->compress_out+=ret;
51                 }
52         return(ret);
53         }
54
55 int COMP_expand_block(COMP_CTX *ctx, unsigned char *out, int olen,
56              unsigned char *in, int ilen)
57         {
58         int ret;
59
60         if (ctx->meth->expand == NULL)
61                 {
62                 /* ZZZZZZZZZZZZZZZZZ */
63                 return(-1);
64                 }
65         ret=ctx->meth->expand(ctx,out,olen,in,ilen);
66         if (ret > 0)
67                 {
68                 ctx->expand_in+=ilen;
69                 ctx->expand_out+=ret;
70                 }
71         return(ret);
72         }